----- "Steven Ellis" steven.ellis@bulletin.net wrote:

My issue is I can't see any way to bring up NAT guests unless they are using a ethernet interface that has a address for the host OS.

How will you NAT without an interface address to translate to? You can probably wrangle the scripts into supporting your own configured mangle/NAT setup with something handling the ARP for you on the unnumbered interface, but that's probably beyond the scope of this list.